gistfile1.rs

struct Point {
    x: int,
    y: int
}

trait Positioned {
    fn x(&self)-> int;
    fn y(&self)-> int;
    fn setX(&mut self, int);
    fn setY(&mut self, int);
}

trait Movable: Positioned {
    fn translate(&mut self, dx: int, dy: int);
}

struct Entity {
    pos: Point,
}

impl Positioned for Entity {
    fn x(&self)-> int {
        self.pos.x
    }
    fn y(&self)-> int {
        self.pos.y
    }
    fn setX(&mut self, v: int) {
        self.pos.x = v;
    }
    fn setY(&mut self, v: int) {
        self.pos.y = v;
    }
}

impl Movable for Entity {
    fn translate(&mut self, dx: int, dy: int) {
        let x = self.x();
        let y = self.y();
        self.setX(x + dx);
        self.setY(y + dy);
    }
}

fn main() {
    let mut e = Entity {
        pos: Point { x: 0, y: 0 },
    };

    println(fmt!("%?, %?", e.x(), e.y()));
    e.translate(5, 10);
    println(fmt!("%?, %?", e.x(), e.y()));
}